Vacuum bottle



FIG. 1 is a top plan view of an embodiment of a vacuum bottle illustrating my design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front plan view thereof; with the right side view, the left side view and the back view being substantially the same as the front view; and,

FIG. 4 is a perspective view thereof. 

The ornamental design for a vacuum bottle, as shown and described. 